The Hose Washers Combo Pack are soft and resilient for a water-tight seal. This combo washer pack includes 6 red rubber washers and 6 black O-ring rubber washers. The O-ring design allows for maximum sealing performance. Saves water and helps prevent leaks between your hose, sprinklers, and hose-end products. Use with any standard female hose end product. Durable rubber material resists hardening and cracking. For outdoor use with cold water only.